Machine for profiling sheet metal



2 sheets shee c 1.

(No-Model.)

G. A; URL. MACHINE FOR PROFILING SHEET METAL.

No. 488,576. Patented De0f27, 1.892.

fnmeiz for.

(No Model.) 2 Shets-Sheet 2.

G. A. OHL. MACHINE FOR PROFILING SHEET METAL.

No. 488,576. Patented Dec. 27, 1892.

' @Zfi; Z Zmrzior.

&MZZWZ&

. head bya connecting rod formed in two parts NITE STATES ATENT FFICE.

GEORGE A. OI-IL, OF NEi/VARK, NEW JERSEY.

SPECIFICATION forming part of Letters Patent No. 488,576, dated December27, 1892.

Application filed June 11, 1892- Serial No. 436,337. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE A. OHL, a citizen of the United States,residing at Newark, Essex county, New Jersey, have invented certain newand useful Improvements in Machines for Profiling Sheet Metal, fullydescribed and represented in the following specification andtheaccompanyin g drawings, forming a part of the same.

This invention relates to that class of machines in which sheet metal isinserted between two narrow profile dies and subjected to repeated blowsby the upper die to alter the cross section of the metal, and the objectof the invention is to furnish a means of conveniently adjusting andsecuring the lower dies in the positions required to produce a varietyof objects. In such machines the upper die may be reciprocated rapidlyby any suitable means, that shown herein consisting in a revolving crankshaft and suitable connections to a sliding crosshead.

The invention will be understood by reference to the annexed drawings,in which Figure 1 is a side elevation, and Fig. 2 a front elevation of amachine provided with my improvements. Fig. 3 is a plan of the table anddies with the die beds inclined outwardly in the rear; Fig. 4 is a sideelevation of the same parts with the die beds set parallel. Fig. 5 is afront elevation of the same parts with the die beds set parallel, andthe dies inclined inwardly at the top. Fig. 6 is a plan of the die bedsand holders set in close contact; Fig. 7 is an edge view, and Fig. 8 aside View of a round shank die; Fig. 9 isa longitudinal section of theadjusting nut with a part of the connecting rod for the crosshead. Fig.10 is a cross section on line 00, w, in Fig. 9.

A is an upright frame or column having a bracket or table B projectedfrom the front, and a goose neck 0 in which the crosshead D is fittedmovably. A crank shaft 2 with pulleys e, is journaled in bearings f inthe rear of the column and connected bya rod f with a double lever gpivoted upon the top of the column. The lever is connected with thecrossk', 10 the inner ends of which are threaded and coupled bya nut 72.having right and left hand threads formed in its opposite ends, as shownin Fig. 9. The upper end of the rod is pivoted to the lever g, and thelower end to the crosshead D. The parts of the rod are threaded to fitsuch nut and are drawn together or forced apart when the nut is turnedby the band wheel h attached thereto. Two slots 9 are shown cutlengthwise in the upper half of the nut, forming an elastic tongue gwhich contains a portion of the screw 6o thread. A band f is fitted overthe end of the nut and provided with a set screw f by which the tongue 9may be pressed toward the rod when required to take up lost motion.

In such machines it is common to provide a single die Z attached to thecrosshead by holder 1', and to support two die holders upon the table Bwith means for holding two dies in different relations to the upper dieZ.

In my construction the lower die holders m are set upon segments orcylinders n, which form the die beds and which are pivoted upon carriers0 to permit their adjustment at different angles thereon. The carriersare adjustable to and from one another upon a bed 5 plate 10 which issecured to the table by bolt q. The carriers are fitted to guides whichare shown as a dovetail 0' upon the plate p and are connected by a rightand left screw 1' which is journaled in a central bearing 8 so as to setthe carriers equally from the center line of the upper die]. The guideson the bed plate hold the carriers parallel but movable to and from thecentral line of the upper die. The segmental cylindrical faces of thedie-beds n are presented outwardly and upwardly, and the feet of thedie-holders m are formed of concave segments fitted to the cylindricalexterior of the die-beds and pro- Vided with slots n through which boltsn are 0 inserted in the beds. The heads of the bolts are thus presentedoutwardly at an angle, which affords the most convenient access to them,while it permits the die holders to be tipped somewhat in eitherdirection from the 5 vertical line. The set screws n are provided in thejaws of the holders to clamp the lower dies o.

In Fig. 4: the holders m are shown tipped inwardly with the dies 1)inclined toward the loo center of the machine, as is required in curvinga sheet metal molding in avertical plane, and in Fig. 3 the die beds 02are shown inclined outwardly at their rear ends, as is required incurving a sheet metal molding in a horizontal plane. The die beds arepivoted at the front end of the carriers by bolts 10, and are providedat their rear ends with swiveled nuts t which are connected by a rightand left hand screw 25 to set them simultaneously at the same angle. Abearing 8 is fixed to the table to which the middle of the screw 75 isfitted, with a lateral play in the bearing, to permit the outwardmovement of the screw as the die beds swing around the bolts 19. Boltsit are inserted through the rear ends of the beds into curved slots toformed in the rear ends of the carriers; by which bolts the carriers maybe clamped when adjusted, if desired. Such bolts are not however usedwhen the die beds require frequent adjustment; but may be used when alarge number of similar pieces are to be shaped upon the dies, and thelatter may then be secured in a fixed position.

The carriers 0 are shown in Figs. 3 and 5 separated, as is common whentwo dies below are opposed to the upper die Z; but where it is desiredto use a single bottom die, the die holders m may be set vertically asshown in Fig. 2, and the die '0 clamped between the carriers byoperating the screw 1". To sustain the pressure upon the die when thusclamped the shoulders q) are formed upon the inner sides of the dieholders m, and the lower die is thus readily clamped in place orreleased without employing a special holder for the same. Where a diewith a round shank is used, as is sometimes required, to turn theworking faces into a convenient position for the operator, such shankmay be clamped between the adjacent faces of the die holders m byforming semi-cylindrical sockets o therein as shown in Fig. 6. In thisfigure, the die beds are shown pressed toward one another the same as inFig. 2, in which position they would operate to clamp a round shank,such as is shown upon the tool in Figs. 7 and 8.

It will be seen from the above description that the constructionprovided for the holders m,the die beds 'n, and the carriers 0, isadapted to set the dies in any required position excepting the raisingof one end of the die,which is commonly done by tipping the die in theholder, as shown by the dotted lines o in Fig. 5.

By means of the screw 4", the dies may be adjusted laterally in asymmetrical manner in reference to the die Z, and by the screw 75 thedie beds may be inclined in a horizontal plane, while the cylindricalsurfaces of the die beds 'n permit the die holders to be set at anydesired angle in a Vertical plane. The formation of the shoulders 22 andof the segmental sockets 'u also permits the holding of a single diecentrally beneath the upper die by the same holders as are adapted tocarry the two lower dies.

By means of the elastic tongue g in the nut connecting the two parts ofthe connecting rod, the nut may be prevented from turning voluntarilyupon the rod although it does not prevent the operator from turning thenut during the working of the machine to vary the operation of the dies,or to successively increase the pressure upon the sheet metal as ityields in the hammering operation.

Having thus set forth the nature of my invention what I claim herein is:

1. In a machine for profiling sheet metal, the combination, with the dieZ and mechanism for reciprocating. the same, of the bed plate 1), thecarriers 0 fitted to guides thereon, the die-beds 01. secured upon thecarriers and formed with segmental cylindrical faces presentedoutwardly, and the die-holders m hav- 1ng concave segmental feetfittedto such faces and provided with the slots n and bolts n, as and for thepurpose set forth.

2. In a machine for profiling sheet metal, the combination, with the dieZ and mechanism for reciprocating the same, of the bed plate 19, thecarriers 0 fitted to guides thereon, the right and left hand screw 1"fitted to the carriers and to the bearing 8 upon the bed plate, dieholders pivoted at one end to the carriers and at the opposite endsprovided with swiveled nuts 25 and the right and left screw t secured inthe bearing 8', as and for the purpose set forth.

3. Ina machine for profiling sheet metal, the combination, with the dieZ and mechanism for reciprocating the same, of the bed plate p, thecarriers 0 fitted to guides thereon, the right and left hand screw rfitted to the carriers and to the bearing 5 upon the bed plate, dieholders pivoted at one end to the carriers and at the opposite endsprovided with swiveled nuts t, the right and left screw 25 fitted tobearing 8 upon the bed plate, and the clamp bolts 1/. fitted to slots uin the carriers, as and for the purpose set forth.

4. In a machine for profiling sheet metal, the combination, with the dieZ and mechanism for reciprocating the same, of the bed plate 19, thecarriers 0 fitted to guides thereon, the die beds n with cylindricalfaces and pivoted one end upon the carriers owith their opposite endsconnected by the right and left hand screw 25', and the holders m withfeet fitted to the cylindrical faces and means for clamplng themthereto, as and for the purpose set forth.

5. In a machine for profiling sheet metal, the combination, with the dieZ and mechanism for reciprocating the same, of the bed plate 19, thecarriers 0 fitted to guides thereon, the right and left hand screw'r'fitted to the carriers and to the bearings upon the bed plate dieholders mounted upon such carriers and provided with the shoulders 12forsupporting and clampinga die centrally between the die holders, asand for the purpose set forth.

6. In a machine for profiling sheet metal, the combination, with the dieZ and mechan ism for reciprocating the same, of the bed plate p, thecarriers 0 fitted to guides thereon, the right and left hand screw 1"fitted to the carriers and to the bearing 8 upon the bed with the slitsg forming the tongue 9 and the band) with set screw f for adjusting thetongue, substantially as herein set forth;

In testimony whereof I have hereunto set 15 my hand in the presence oftwo subscribing witnesses. Y 1

GEORGE A; OHL.

Witnesses:

H. J. MILLER, EDW. F. KINsEY.

